Football helmet bell



FIG. 1 is a left side elevation view;

FIG. 2 is a right side elevation view;

FIG. 3 is a top view;

FIG. 4 is a bottom view;

FIG. 5 is a front elevation view; and,

FIG. 6 is a rear elevation view.

The broken lines in the drawings illustrate features and linear detail that form no part of the claim. 

CLAIM The ornamental design for a football helmet bell, as shown and described. 